The PE-08-BI-DF-W 1/4″ John Guest tubing is white polyethylene tubing used for potable water lines in under-sink filtration and reverse osmosis systems that use 1/4-inch push-to-connect fittings. It is commonly used to replace old tubing, extend a line, or complete an installation where clean, leak-resistant connections and correct tubing size matter.
Model number: PE-08-BI-DF-W
Tubing size and type
- Outside diameter: 1/4-inch OD
- Color: white
- Material: polyethylene (PE) potable water tubing
- Connection type: compatible with 1/4-inch OD push-to-connect fittings (John Guest style)
Compatibility checks
Before ordering, confirm:
- Your fittings are designed for 1/4-inch OD tubing
- Your application is a potable cold-water line
- You have enough length for a smooth run without sharp bends
- Your tubing route avoids kinks and pinch points
What’s included
- John Guest 1/4-inch OD white polyethylene tubing (length as selected)
Install difficulty: easy
Installation Guidance: PE-08-BI-DF-W 1/4″ John Guest Tubing
- Shut off water to the line.
- Relieve pressure at the faucet or dispensing point.
- Remove old tubing by releasing the collet (if push-to-connect).
- Cut new tubing cleanly and square.
- Route tubing with gentle curves.
- Push the tubing fully into the fitting until seated.
- Turn the water on slowly and check for leaks.
- Recheck later the same day.
Replacement triggers
- Cracking, discoloration, stiffness, or abrasion
- Leaks that persist after reseating and making a clean cut
- Kinks or flattened sections restricting flow
Common Questions on Tubing
Q: What does 1/4-inch OD mean?
A: It refers to the outside diameter. OD sizes push-to-connect fittings, so match OD, not ID.
Q: Will this work with RO systems?
A: Yes, many RO systems use 1/4-inch OD tubing for feed, drain, and faucet lines.
Q: Why is my fitting leaking after replacing the tubing?
A: Common causes are an angled cut, tubing not fully seated, a scratched tube end, or a worn fitting seal.
Match your system’s 1/4-inch OD line size and replace your tubing with John Guest 1/4-inch potable water tubing for clean routing and reliable push-to-connect connections.
Quantity is adjustable in the shopping cart.
Tubing Comes on Rolls of 500′.
